Coverage Report

Created: 2020-06-30 13:58

/src/botan/src/lib/asn1/asn1_obj.cpp
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Source (jump to first uncovered line)
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/*
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* ASN.1 Internals
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* (C) 1999-2007,2018 Jack Lloyd
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*
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* Botan is released under the Simplified BSD License (see license.txt)
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*/
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#include <botan/asn1_obj.h>
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#include <botan/der_enc.h>
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#include <botan/data_src.h>
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#include <botan/internal/stl_util.h>
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#include <sstream>
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namespace Botan {
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std::vector<uint8_t> ASN1_Object::BER_encode() const
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12.0k
   {
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   std::vector<uint8_t> output;
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   DER_Encoder der(output);
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   this->encode_into(der);
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   return output;
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   }
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/*
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* Check a type invariant on BER data
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*/
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void BER_Object::assert_is_a(ASN1_Tag type_tag_, ASN1_Tag class_tag_,
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                             const std::string& descr) const
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721k
   {
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721k
   if(this->is_a(type_tag_, class_tag_) == false)
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      {
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      std::stringstream msg;
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      msg << "Tag mismatch when decoding " << descr << " got ";
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      if(class_tag == NO_OBJECT && type_tag == NO_OBJECT)
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         {
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         msg << "EOF";
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         }
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      else
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         {
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         if(class_tag == UNIVERSAL || class_tag == CONSTRUCTED)
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            {
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            msg << asn1_tag_to_string(type_tag);
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            }
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         else
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            {
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            msg << std::to_string(type_tag);
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            }
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         msg << "/" << asn1_class_to_string(class_tag);
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         }
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      msg << " expected ";
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      if(class_tag_ == UNIVERSAL || class_tag_ == CONSTRUCTED)
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         {
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         msg << asn1_tag_to_string(type_tag_);
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         }
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      else
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         {
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         msg << std::to_string(type_tag_);
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         }
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      msg << "/" << asn1_class_to_string(class_tag_);
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      throw BER_Decoding_Error(msg.str());
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      }
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721k
   }
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bool BER_Object::is_a(ASN1_Tag type_tag_, ASN1_Tag class_tag_) const
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1.03M
   {
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   return (type_tag == type_tag_ && class_tag == class_tag_);
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1.03M
   }
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bool BER_Object::is_a(int type_tag_, ASN1_Tag class_tag_) const
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206k
   {
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   return is_a(ASN1_Tag(type_tag_), class_tag_);
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   }
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void BER_Object::set_tagging(ASN1_Tag t, ASN1_Tag c)
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1.42M
   {
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   type_tag = t;
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   class_tag = c;
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   }
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std::string asn1_class_to_string(ASN1_Tag type)
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   {
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   switch(type)
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      {
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      case UNIVERSAL:
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         return "UNIVERSAL";
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      case CONSTRUCTED:
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         return "CONSTRUCTED";
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      case CONTEXT_SPECIFIC:
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         return "CONTEXT_SPECIFIC";
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      case APPLICATION:
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         return "APPLICATION";
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      case CONSTRUCTED | CONTEXT_SPECIFIC:
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         return "PRIVATE";
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0
      case Botan::NO_OBJECT:
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         return "NO_OBJECT";
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      default:
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         return "CLASS(" + std::to_string(static_cast<size_t>(type)) + ")";
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      }
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   }
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std::string asn1_tag_to_string(ASN1_Tag type)
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   {
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   switch(type)
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      {
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      case Botan::SEQUENCE:
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         return "SEQUENCE";
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0
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      case Botan::SET:
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         return "SET";
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0
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      case Botan::PRINTABLE_STRING:
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         return "PRINTABLE STRING";
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0
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      case Botan::NUMERIC_STRING:
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         return "NUMERIC STRING";
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0
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      case Botan::IA5_STRING:
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         return "IA5 STRING";
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      case Botan::T61_STRING:
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         return "T61 STRING";
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      case Botan::UTF8_STRING:
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         return "UTF8 STRING";
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      case Botan::VISIBLE_STRING:
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         return "VISIBLE STRING";
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      case Botan::BMP_STRING:
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         return "BMP STRING";
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      case Botan::UNIVERSAL_STRING:
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         return "UNIVERSAL STRING";
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      case Botan::UTC_TIME:
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         return "UTC TIME";
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      case Botan::GENERALIZED_TIME:
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         return "GENERALIZED TIME";
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      case Botan::OCTET_STRING:
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         return "OCTET STRING";
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      case Botan::BIT_STRING:
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         return "BIT STRING";
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      case Botan::ENUMERATED:
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         return "ENUMERATED";
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      case Botan::INTEGER:
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         return "INTEGER";
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      case Botan::NULL_TAG:
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         return "NULL";
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      case Botan::OBJECT_ID:
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         return "OBJECT";
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      case Botan::BOOLEAN:
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         return "BOOLEAN";
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      case Botan::NO_OBJECT:
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         return "NO_OBJECT";
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      default:
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         return "TAG(" + std::to_string(static_cast<size_t>(type)) + ")";
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      }
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   }
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/*
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* BER Decoding Exceptions
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*/
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BER_Decoding_Error::BER_Decoding_Error(const std::string& str) :
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   Decoding_Error("BER: " + str) {}
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BER_Bad_Tag::BER_Bad_Tag(const std::string& str, ASN1_Tag tag) :
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      BER_Decoding_Error(str + ": " + std::to_string(tag)) {}
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BER_Bad_Tag::BER_Bad_Tag(const std::string& str,
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                         ASN1_Tag tag1, ASN1_Tag tag2) :
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   BER_Decoding_Error(str + ": " + std::to_string(tag1) + "/" + std::to_string(tag2)) {}
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namespace ASN1 {
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/*
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* Put some arbitrary bytes into a SEQUENCE
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*/
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std::vector<uint8_t> put_in_sequence(const std::vector<uint8_t>& contents)
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47.0k
   {
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   return ASN1::put_in_sequence(contents.data(), contents.size());
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   }
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std::vector<uint8_t> put_in_sequence(const uint8_t bits[], size_t len)
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   {
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   std::vector<uint8_t> output;
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   DER_Encoder(output)
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      .start_cons(SEQUENCE)
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         .raw_bytes(bits, len)
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      .end_cons();
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   return output;
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   }
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/*
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* Convert a BER object into a string object
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*/
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std::string to_string(const BER_Object& obj)
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   {
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   return std::string(cast_uint8_ptr_to_char(obj.bits()),
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                      obj.length());
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   }
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/*
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* Do heuristic tests for BER data
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*/
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bool maybe_BER(DataSource& source)
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33.9k
   {
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   uint8_t first_u8;
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   if(!source.peek_byte(first_u8))
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      {
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      BOTAN_ASSERT_EQUAL(source.read_byte(first_u8), 0, "Expected EOF");
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      throw Stream_IO_Error("ASN1::maybe_BER: Source was empty");
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33.8k
      }
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   if(first_u8 == (SEQUENCE | CONSTRUCTED))
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      return true;
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   return false;
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   }
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}
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}